Headset



FIG. 1 is a perspective view of the headset;

FIG. 2 is a side view thereof;

FIG. 3 is a front view thereof, the undisclosed portion is not part of the claimed design;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a side view thereof; and,

FIG. 7 is a back view thereof. 

The ornamental design for headset, as shown and described. 